The first distance iron to make it on tour, TaylorMade RocketBladez Irons are powered by the Speed Pocket. This little thing has changed the iron forever. Only RocketBladez are powered by the Speed Pocket to promote radically increased speed and distance. This revolutionary technology is engineered for optimum face-flex, creating a consistent and stronger ball flight. RocketBladez are the true blend of the finesse the pros demand and the explosive distance amateurs crave. Get them or get left behind. RBZ Speed Pocket Inspired by the distance-enhancing benefits of the RBZ Speed Pocket technology that makes RocketBallz fairway woods and Rescues so fast and long, TaylorMade engineers found a way to incorporate a Speed Pocket into irons. The result is a once-in-a-lifetime innovation that revolutionizes iron performance not only in terms of distance, but also distance-control and feel. The RBZ Speed Pocket in RocketBladez irons flexes and rebounds at impact, increasing the speed of the face to promote faster ball speed and a higher, stronger ball flight that lands on a steep, quick-stopping descent angle. This Speed Pocket advantage is especially effective on impacts made low on the face, TaylorMade studies indicate that 72% of iron shots hit by amateur golfers are struck below center face. The RBZ Speed Pocket in all RocketBladez iron models is filled with a Polyurethane Reactive (PUR) made by 3M that keeps out debris and dampens unwanted vibration while still allowing the slot to flex at impact.